git-push: plumb in --mirror mode

diff --git a/builtin-send-pack.c b/builtin-send-pack.c
index c1fd3f5fbb912e0d663e91007158460df33f3098..d42164ec085a4843fb52ee8ed9d04c47e3c09db0 100644 (file)
--- a/builtin-send-pack.c
+++ b/builtin-send-pack.c
@@ -8,7 +8,7 @@
 #include "send-pack.h"
 
 static const char send_pack_usage[] =
-"git-send-pack [--all] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
+"git-send-pack [--all | --mirror] [--dry-run] [--force] [--receive-pack=<git-receive-pack>] [--verbose] [--thin] [<host>:]<directory> [<ref>...]\n"
 "  --all and explicit <ref> specification are mutually exclusive.";
 
 static struct send_pack_args args = {
@@ -227,6 +227,12 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
        int allow_deleting_refs = 0;
        int expect_status_report = 0;
        int shown_dest = 0;
+       int flags = MATCH_REFS_NONE;
+
+       if (args.send_all)
+               flags |= MATCH_REFS_ALL;
+       if (args.send_mirror)
+               flags |= MATCH_REFS_MIRROR;
 
        /* No funny business with the matcher */
        remote_tail = get_remote_heads(in, &remote_refs, 0, NULL, REF_NORMAL);
@@ -242,7 +248,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
        if (!remote_tail)
                remote_tail = &remote_refs;
        if (match_refs(local_refs, remote_refs, &remote_tail,
-                      nr_refspec, refspec, args.send_all))
+                                              nr_refspec, refspec, flags))
                return -1;
 
        if (!remote_refs) {
@@ -259,20 +265,28 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
                char old_hex[60], *new_hex;
                int will_delete_ref;
                const char *pretty_ref;
-               const char *pretty_peer;
+               const char *pretty_peer = NULL; /* only used when not deleting */
+               const unsigned char *new_sha1;
 
-               if (!ref->peer_ref)
-                       continue;
+               if (!ref->peer_ref) {
+                       if (!args.send_mirror)
+                               continue;
+                       new_sha1 = null_sha1;
+               }
+               else
+                       new_sha1 = ref->peer_ref->new_sha1;
 
                if (!shown_dest) {
                        fprintf(stderr, "To %s\n", dest);
                        shown_dest = 1;
                }
 
+               will_delete_ref = is_null_sha1(new_sha1);
+
                pretty_ref = prettify_ref(ref->name);
-               pretty_peer = prettify_ref(ref->peer_ref->name);
+               if (!will_delete_ref)
+                       pretty_peer = prettify_ref(ref->peer_ref->name);
 
-               will_delete_ref = is_null_sha1(ref->peer_ref->new_sha1);
                if (will_delete_ref && !allow_deleting_refs) {
                        fprintf(stderr, " ! %-*s %s (remote does not support deleting refs)\n",
                                        SUMMARY_WIDTH, "[rejected]", pretty_ref);
@@ -280,7 +294,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
                        continue;
                }
                if (!will_delete_ref &&
-                   !hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
+                   !hashcmp(ref->old_sha1, new_sha1)) {
                        if (args.verbose)
                                fprintf(stderr, " = %-*s %s -> %s\n",
                                        SUMMARY_WIDTH, "[up to date]",
@@ -312,8 +326,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
                    !is_null_sha1(ref->old_sha1) &&
                    !ref->force) {
                        if (!has_sha1_file(ref->old_sha1) ||
-                           !ref_newer(ref->peer_ref->new_sha1,
-                                      ref->old_sha1)) {
+                           !ref_newer(new_sha1, ref->old_sha1)) {
                                /* We do not have the remote ref, or
                                 * we know that the remote ref is not
                                 * an ancestor of what we are trying to
@@ -328,7 +341,7 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
                                continue;
                        }
                }
-               hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
+               hashcpy(ref->new_sha1, new_sha1);
                if (!will_delete_ref)
                        new_refs++;
                strcpy(old_hex, sha1_to_hex(ref->old_sha1));
@@ -365,8 +378,9 @@ static int do_send_pack(int in, int out, struct remote *remote, const char *dest
                        char quickref[83];
                        char type = ' ';
                        const char *msg = "";
-
-                       strcpy(quickref, find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV));
+                       const char *old_abb;
+                       old_abb = find_unique_abbrev(ref->old_sha1, DEFAULT_ABBREV);
+                       strcpy(quickref, old_abb ? old_abb : old_hex);
                        if (ref_newer(ref->peer_ref->new_sha1, ref->old_sha1))
                                strcat(quickref, "..");
                        else {
@@ -458,6 +472,10 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
                                args.dry_run = 1;
                                continue;
                        }
+                       if (!strcmp(arg, "--mirror")) {
+                               args.send_mirror = 1;
+                               continue;
+                       }
                        if (!strcmp(arg, "--force")) {
                                args.force_update = 1;
                                continue;
@@ -482,7 +500,12 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
        }
        if (!dest)
                usage(send_pack_usage);
-       if (heads && args.send_all)
+       /*
+        * --all and --mirror are incompatible; neither makes sense
+        * with any refspecs.
+        */
+       if ((heads && (args.send_all || args.send_mirror)) ||
+                                       (args.send_all && args.send_mirror))
                usage(send_pack_usage);
 
        if (remote_name) {